Ready-to-Move vs Under Construction in Bangalore: 2026 Comparison

Choosing between a ready-to-move flat and an under-construction one is, at its core, a trade between certainty and price. A ready-to-move (RTM) flat with an Occupancy Certificate carries zero GST and lets you inspect the exact unit you are buying, but you pay a premium for that certainty. An under-construction (UC) flat is typically 15–20% cheaper and may qualify for a 1% GST rate, but you take on delay, quality and builder-solvency risk, and you cannot see the finished unit before you commit. This comparison lays out the numbers and gives you clear decision rules for Bangalore.

The comparison at a glance

Everything below expands these five rows with the current rules and real rupee numbers.

Price: why under-construction is 15–20% cheaper

The discount is not generosity; it is economics. When you buy under-construction, your construction-linked payments fund the build. In effect, the builder is financing the project partly from your money rather than borrowing the whole amount from a bank, and prices the flat lower to compensate you for waiting and for carrying the risk that the project slips or, in the worst case, stalls. A ready-to-move flat carries none of that risk for you; the building exists and is occupiable, so it commands a premium. The 15–20% gap is the market's price for certainty.

The catch is that the headline gap shrinks once tax enters the picture, which is the next row.

The GST impact: 5% on UC vs 0% on RTM

This is the single most underappreciated number in the comparison, so let's be precise. GST applies only to under-construction property, because the law treats an incomplete building as a construction service. The moment a project receives its Occupancy Certificate or Completion Certificate, it becomes immovable property under Schedule III of the CGST Act and attracts no GST at all.

The current rates, unchanged through the latest GST Council positions:

• 5% on under-construction standard (non-affordable) housing, without input tax credit.
• 1% on under-construction affordable housing: units priced up to ₹45 lakh with carpet area up to 60 sq m in metros, and Bengaluru is classified as a metro.
• 0% on ready-to-move flats backed by a valid OC.

GST is charged after deducting one-third of the value as deemed land cost. A worked example makes the difference concrete:

Take a ₹1 crore under-construction (non-affordable) flat. One-third (~₹33.3 lakh) is treated as land and is GST-exempt; GST at 5% applies to the remaining ~₹66.7 lakh, which is roughly ₹3.3 lakh of GST. The same flat bought ready-to-move with an OC attracts zero GST. That ₹3.3 lakh swing is real money, and it offsets a meaningful chunk of the 15–20% base-price advantage that under-construction started with.

So when you compare, never compare sticker prices. Add 5% (or 1%) GST to the UC flat, and add the rent you will keep paying during construction, before you decide which is genuinely cheaper.

Risk: delay, quality and builder solvency

The risk all sits on the under-construction side. The flat might be delivered late, built to a lower spec than promised, or, in the rare but ruinous case, never completed because the builder ran out of money. Your protection is RERA.

For a UC purchase, vet the project on the Karnataka RERA portal: registration number, sanctioned plans, committed completion date, and the quarterly progress reports the builder must file. RERA also requires 70% of buyer funds to be held in a project escrow account, caps the pre-agreement advance at 10% of the price, and imposes a five-year structural-defect liability on the builder, with defects to be repaired within 30 days.

If the builder misses the promised date, Section 18 gives you two options: withdraw and claim a full refund with interest, or stay and claim delay interest for every month late. The interest rate is SBI MCLR + 2%, roughly 11% per annum at recent MCLR levels. Karnataka RERA has enforced this in practice: in one Bengaluru case the authority ordered a builder to refund close to ₹33 lakh with interest at SBI MCLR + 2% after possession was not delivered, and in another imposed a penalty of up to 5% of project cost on a developer for ignoring its refund order. The protection is real, but enforcement can be slow, which is itself a reason to buy from a builder with a clean delivery record. A ready-to-move flat sidesteps all of this: there is no possession date to miss.

Possession timing and what it does to registration and Khata

For under-construction you typically sign a Sale Agreement first, with payments linked to construction milestones, and the Sale Deed is registered at possession. For ready-to-move, that gap collapses; you register quickly. The distinction matters legally, and it is worth reading our breakdown of the Sale Deed versus the Sale Agreement before you sign anything, because the document that protects you differs by stage.

Two cost notes that apply equally to both: stamp duty follows Karnataka's slabs and the registration fee is now 2% of property value (raised from 1% effective 31 August 2025). The base for stamp duty is the higher of your sale price or the area's guidance value, so check the guidance value on Kaveri before you budget. On the records side, a ready-to-move flat should already have its e-Khata in place via BBMP e-Aasthi; an under-construction flat's e-Khata and, critically, its Occupancy Certificate come only at completion.

Inspection rights: only RTM lets you see the real thing

With a ready-to-move flat you inspect the actual unit: the finishes, the water pressure, the ventilation, the light at different times of day, the lift, the common areas, the parking, and any deviations from the brochure. With under-construction you see a sample flat or a specification sheet, and you are buying a promise. That makes the specification schedule in your sale agreement and the carpet-area definition the things to scrutinise hardest, because they are all you are contractually guaranteed until handover. RERA's mandate to price on carpet area (not super built-up) helps, but read the schedule line by line.

When under-construction makes sense

• You want the lowest entry price and can absorb the 15–20% base discount being partly offset by 5% GST.
• You can wait 12–48 months without a punishing rent-plus-EMI overlap.
• You are buying from a RERA-registered builder with a strong on-time delivery record.
• You want payment spread across construction milestones rather than a lump sum.
• The unit qualifies as affordable housing (≤₹45 lakh, ≤60 sq m carpet), so you pay just 1% GST.

When ready-to-move makes sense

• You need to move in now and cannot carry rent and an EMI together.
• You want zero GST: a clean 0% on a flat with a valid OC.
• You want to inspect the exact unit and remove delivery and quality risk entirely.
• You value certainty over squeezing out the lowest possible price.
• You want immediate e-Khata and OC so the title is financeable and resaleable from day one.

Bangalore-specific factors

Locality deliverability records matter as much as the RTM-vs-UC question itself. Whitefield is the city's most consistent end-user and rental market, anchored by IT employment and a deep base of completed stock, a relatively lower-risk place to buy under-construction because demand and delivery are both established. Sarjapur Road offers higher growth potential but carries more construction-delay and congestion risk, so builder selection matters more there. North Bangalore (Devanahalli, Yelahanka, Bagalur) is riding airport-led and infrastructure-led growth, with plotted and apartment supply expanding; promising, but verify each project's approvals individually rather than relying on the corridor's momentum. Wherever you buy under-construction, the RERA record of the specific project beats any general sense of the locality.

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